Automatic speed-change device



H. QHLMANSKEIK AUTOMATIC SPEED CHANGE DEVICE 5 Sheets-Sheet 1 Filed June 9 1923 fiug. 17-, 1926. 1596;682

c. H. OHLMANSIEK AUTOMATIC SPEED CHANGE DEVICE Filed June-9, I923 Sheets-Sheet 2 Aug. 17 1926.

JMEQfifiSZ a. H. UE ILMANE IE K .7 AUTOMATIC SPEED CHANGE DEVICE Filed June 9. 1923 5 Sheefisheet 3 Aug 17, 1926. 1,596.682.

c. H. OHLMANSIEK AUTOMATIC SPEED CHANGE DEVICE Filed June 9. 1923 5 Sheets-Sheet 4.

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AUTOMATIC glE'EED-GHANGE DEVICE.

Application filed. June 9,

This invention relates to an. automatic speed change device for changing the speed of the generator drive shaft.

An object of the invention to provide means whereby a direct drive is accomnlished when the battery is fully charged, and to automatically increase the speed of the generator drive shaft when the battery is to be charged.

Another object is the provision. of means for increasing the speed of the generator drive shaft when revolving at a low rate of speed, and to form. a direct drive when revolving at a highrate of speed.

A still further object is to provide means whereby the. speed of a generator drive shaft will he held to the low rate when iihe battery is fully charged, irrespective of the speed of the driving moans.

Other objects and advantages of the invontion will be apparent during the course of the following dcscrliption.

"in. the accompanying drawings forming a part of this application andlii which like numerals are employed to designate like parts throughout the same Figure 1 is a plan view of any improved apparatus,

Figure 2 is a central section taken on line 2--2 of Figure l.

Figure is a. cross section taken on line 3-3 of Figure 2.

Figure 4- is a view partially in section, similar to Fig. 2. showing the apparatus in u dii'lercnt position.

Figure dis a side elevation of the automatic operating; moans.

Figure/6 is a section taken on line 66 of Fig. 5

Figure 7 is a section taken on line 7-7 of Fig. 1.

Figure 8 is a detail view showing the mon'iher to he (.ipcrated by the battery. and

Figure 9 is a dia unmatic view of the menus for ileterinini g the operation of the device.

ln the drawing, the numeral 10 designeacs a hollow drive shaft mounted loose you a driven shaft 11, by the means of roller bearings 12 and 13 at the opposite ends of said hollow drive shaft. Permanently secured to one end of said drive shaft 1923. Serial No. 644,356.

10 is a gear 14 to which the power from an engine or the like is adapted to be applied. Arranged. for supporting said shafts are two upright supports 15 and 16 having their upper and lower ends suitably secured. to cross braces 17 and 18. Said upright 15 has a roller bearing or the like 19 mounted therein for receiving the hollow sleeve 10, while the upright 16 has a hearing 20 to receive the driven shaft 11.

Secured to said hollow shaft 10 is a clutch member 21 having two enlarged slots 22 cut directly opposite each other in the periphery thereof for receiving the clutch shoes 23 and 241i. Said shoes have inwardly extending lugs 25 adapted to slide in grooves 26 for holding said shoes in proper position. The engaging faces of said shoes are arouately curved as at 27 for engaging the interior face of a drum 28, which is in turn i carried by a large gear 29. The gear 29 has a roller 30 mounted therein to form a bearing upon the hollow drive shaft 10.

Mounted in the upright supports 15 and 16, above the-driveandrlriven shafts, are bearings 31 and 31 for receiving a countershaft 32. Upon one end is secured a small gear 33 which meshes with the large gear 29. At the'opposite end of said counter shaft 32 and adjacent {said bearing 31' is secured another gear 34: to mesh with a. gear 35 equal in size, secured upon the driven shaft 11. It can be seen that the gear 29 is loose upon the hollow shaft 10, and by means of the clutch 21 it may be secured thereto for driving through the train of 29, 33, 34, 35, and thus drive the driven shaft 11 at a greater speed than the hollow drive shaft 10.

For operating the clutch shoes 23 and 24:, a large fly wheel 36 is permanently secured upon the hollow drive shaft. having slots 3''? and 3S'therein for receiving the governor members 39 and 40. Said governor memhers are T-shaped and have one arm pivoted as at 41 to'the fly wheel 36, while another arm extends through the fly wheel and has weighted ends 42 having screw threaded openings therein to receive the throach-d bolts 43 to which a coil spring 41- is'fa'stened for holding the weighted ends in. By turning said threaded bolts 43, anadjustment may be had for the governor. The other arms of the T-members 39 and 40 extend'in ,threaded' arms 49' threaded in the interior pf hollow shaft 50, which in turn are pivot ally connected as at 51 to said clutch shoes 23 ,and 24. From the foregoing it can be "seen that when the fly wheel 36 revolves at a high. rate of speed the weighted end 42 of the iT-shaped governors 39 and 40 will swing outaw a from each other, can sing the arms 45 to s 'de the sleeve 47 towards the fly wheel 36, and consequently draw the 1 clutch shoes 23 and 24 in and away from the drum 28.

f Permanently mounted upon the hollow drive shaft 10, between the fly wheel 36 and the ear '35, is a sleeve 52 having a pair of sma lbores 53 therein parallel with the main central bore and alining with bores 54 in the hub of the fly wheel 36. Said bores 53 receive pins 55 adapted. to engage the gear 35 when pressure is applied thrcagh the medium of springs 56 eing compressed by the slidable sleeve 47 pressing the pins 57 there against. When clutch shoes 23 and 24 disengage the drum 28, the pins 55 will engage the gear 35 and consequently cause a direct drive through the hollow shaft 10.

Upon the sleeve 52 is a worm 58 ada ted to mesh with a worm ear 59 upon a sha t 60 carried by a U-shape supporting frame 61 secured to the uprights 15 and 16. The shaft 60 has a worm 62 thereon which meshes with a worm gear 63 upon the shaft 64 mounted in brackets 65. A worm 66 is also provided on the shaft 64 to mesh with a worm gear 67 secured to the shaft 68. Through these worms and worm gears the speed of the shaft 68 is reduced to a low degree compared with the speed of the other mechanism.

The shaft 68 extends across the machine a and has a cam or eccentric 69 connected thereto-and is supported in the U-shaped supporting frame 70. Slidably mounted by guides 71 on each side of the supporting frame 70, are T-shaped members 72 and 73. The lower arms of the T-members extend down as at 74 and/7 5 to be enga ed by the cam or eccentric 69 to slide the -members. A s ring 76 ieldably connects the downwar ly extending arms or legs together so that both will engage the eccentric 69. The T-inember 73 has one leg relatively longer than the T-member 7 2, as at 76, and has at its end. a lug 77 adapted to extend through a slot 78 to engage one end of still another T-member 79 slidably supported on the same side of the supporting frame as the T-. member 7 2, in guides 71, while the relatively short leg 80 of the T-member 7 engages the opposite end of said T member 79, so that,

the movement of one of the T members 72 or 73 will move the T member 79 in one direction while the other of the T members 72 or 73 will niovasaid T member 79 in the op-. posite direction. The legs- 81 and 82 of the T-members 72 and 73 extend along each side of an extension 83 'and have notches 84 and 85. therein to be engaged by a movable member 86 carried by the extension 83 which is controlled by the battery. By the member 86 engaging in either of the notches 84 or of the T-members 72 or 73 the same will be -locked against sliding movement, thus the sliding movement of said T member .79 will cease.

The T-member 79 has an arm 87 extending forwardly and enga ing an annular groove 88 in a collar 89 sh ably mounted upon the sleeve 52. The supporting frame 70 has an upwardly extending ortion 90 upon which an arm91 is pivoted as at 92 and has its opposite end bifurcated as at 93 to engage over the arm 87 of the T-member 79. A spring 94 has one end connected to the arm 91 as at 95, while the other end is connected to the extension 90 as at 96. It can be seen T-members' 72 and 73 be en aged by the member 86 that the T-mendmrs 72 and 73 would'be slid back and forth by the arms 74 and 7 5' engaging the eccentric 69, sliding the T-member 79 therewith and consequently the collar 89 moved back and forth, but when the member 86 engages either of the notches in the T-members '72 or 73, the one engaged being held against movement, and thus the T-member 79 would not be moved and would be held in position.

to which is positioned and secured the 11: 1?!

and lower ends of the member 86. slidable member has its opposite ends 1.02 and 103 slidabl arranged 1n bearings 104 and 105 arrange in a rectangular frame 106. Said ends 102 and 103 are arran ed so as to protrude sli htly beyond the si es of the frame 106. ecured 1n the frame 106 on the opposite sides of the slidable member 100 are a pair of electric coils 107 and 108, which are arranged for moving a air of pivoted members 109 and 110 carrie by the frame 106 when said coils are energized. Thefree ends of the pivoted members 109 that should neither the leg 81 or 82 of the and means adapted to be Operated if? when said drive shaft rotates at a high rate sliding said collar under said govern r of speed, and means adapted to be operated 10 arms. I for maintaining the direct drive irrespective 5. In a speed change device, the co iibiof the speed of said drive shaft.

nation of a drive shaft, a driven shaft,iyieans In testimony whereof, I have affixed my for increasing the speed of said driven/shaft signature. when said drive shaft is rotating zit a low rate of speed and to form a direct; drive CONRAD H. OHLMANSTWR' 

